Fabricating efficient SnO2/hydrochar heterojunction visible light photocatalyst for Cr(VI) reduction

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Structure Pub Date : 2025-03-15 DOI:10.1016/j.molstruc.2025.142084

Fen Zhang , Chang Liu , Siyi Wang , Yongcai Zhang

{"title":"Fabricating efficient SnO2/hydrochar heterojunction visible light photocatalyst for Cr(VI) reduction","authors":"Fen Zhang , Chang Liu , Siyi Wang , Yongcai Zhang","doi":"10.1016/j.molstruc.2025.142084","DOIUrl":null,"url":null,"abstract":"<div><div>Despite its low cost, environmental friendliness and excellent stability, SnO2 exhibits no visible light photocatalytic activity due to its wide bandgap. This study aims to develop an efficient visible light photocatalyst by combining SnO2 with hydrochar (HC). A series of SnO2/HC nanocomposites were synthesized using a green one-pot hydrothermal method, by changing the amount of glucose. SnO2/HC-3 exhibited the maximal photocatalytic Cr(VI) reduction rate (0.030 min−1), which is 30 times higher than SnO2 and 5 times higher than HC under visible light (λ > 420 nm) irradiation. Moreover, when the photocatalytic experiment conditions were optimized, SnO2/HC-3 showcased the further improved photocatalytic performance for Cr(VI) reduction. SnO2/HC-3 also remained good photocatalysis capability for Cr(VI) reduction after four cycles, and demonstrated remarkable photochemical stability. The mechanism for the superior visible light photocatalysis of SnO2/HC-3 was explored and proposed. Furthermore, SnO2/HC-3 showcased a high efficiency toward photocatalytic removal of Cr(VI) in the diluted passivation solution of copper alloys under visible light, indicating that SnO2/HC-3 has an application prospect in practical Cr(VI)-containing wastewater treatment.</div></div>","PeriodicalId":16414,"journal":{"name":"Journal of Molecular Structure","volume":"1336 ","pages":"Article 142084"},"PeriodicalIF":4.0000,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Molecular Structure","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022286025007690","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Despite its low cost, environmental friendliness and excellent stability, SnO₂ exhibits no visible light photocatalytic activity due to its wide bandgap. This study aims to develop an efficient visible light photocatalyst by combining SnO₂ with hydrochar (HC). A series of SnO₂/HC nanocomposites were synthesized using a green one-pot hydrothermal method, by changing the amount of glucose. SnO₂/HC-3 exhibited the maximal photocatalytic Cr(VI) reduction rate (0.030 min⁻¹), which is 30 times higher than SnO₂ and 5 times higher than HC under visible light (λ > 420 nm) irradiation. Moreover, when the photocatalytic experiment conditions were optimized, SnO₂/HC-3 showcased the further improved photocatalytic performance for Cr(VI) reduction. SnO₂/HC-3 also remained good photocatalysis capability for Cr(VI) reduction after four cycles, and demonstrated remarkable photochemical stability. The mechanism for the superior visible light photocatalysis of SnO₂/HC-3 was explored and proposed. Furthermore, SnO₂/HC-3 showcased a high efficiency toward photocatalytic removal of Cr(VI) in the diluted passivation solution of copper alloys under visible light, indicating that SnO₂/HC-3 has an application prospect in practical Cr(VI)-containing wastewater treatment.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.